An investigation for the World Anti-Doping Agency (WADA) claims positive tests were concealed at the London Games, the Sochi Winter Olympics, and the 2013 World Athletics Championships. London 2012 was corrupted by Russian athletes on an "unprecedented scale" , said head of the investigation Professor Richard McClaren. More »

More than 1,000 unnamed Russian athletes from across 30 sports were involved in or benefited from manipulations to conceal positive doping tests. This is according to the second half of Professor Richard McLaren's damning independent investigation into doping in sport that was published by the World Anti-Doping Agency (Wada) on Friday (9 December), five months after a first report that supported allegations of widespread state-sponsored Russian doping. "We are now able to confirm the findings of the first report: a cover up that dates back to at least 2011 and continued after the Sochi Winter Olympics games," McLaren was quoted as saying by The Guardian at a packed press conference held at the St Pancras Renaissance Hotel in London. More »

* Independent WADA report says there was an institutional conspiracy * More than 1,000 Russian athletes benefited * McLaren says Russia corrupted London Games on unprecedented scale * More than 30 sports, including soccer, were involved (Adds details) By Mitch Phillips LONDON, Dec 9 (Reuters) - More than 1,000 Russian athletes competing in summer, winter and paralympic sport were involved in or benefited from an institutional conspiracy to conceal positive doping tests, an independent WADA report said on Friday. The second and final part of the report for the World Anti-Doping Agency by Canadian sports lawyer Richard McLaren provided more details of an elaborate state-sponsored doping scheme operated by Russia. More »